{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{4}{c}}
\hline\hline
            &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}&\multicolumn{1}{c}{(4)}\\
            &\multicolumn{1}{c}{ingred}&\multicolumn{1}{c}{ingred}&\multicolumn{1}{c}{ingred}&\multicolumn{1}{c}{ingred}\\
\hline
skills      &       0.562***&       0.538***&       0.556***&       0.563***\\
            &    (0.0831)   &    (0.0828)   &    (0.0819)   &    (0.0913)   \\
\hline
R2          &       0.084   &       0.187   &       0.192   &       0.273   \\
Observations&        2640   &        2640   &        2640   &        2640   \\
Round f.e   &          No   &         Yes   &         Yes   &         Yes   \\
Treatment   &          No   &          No   &         Yes   &          No   \\
Team f.e.   &          No   &          No   &          No   &         Yes   \\
\hline\hline
\multicolumn{5}{l}{\footnotesize Standard errors in parentheses}\\
\multicolumn{5}{l}{\footnotesize * p<0.10, ** p<0.05, *** p<0.010}\\
\end{tabular}
}
